Ten times two is equal to twenty.
<u>Given</u>:
The equation of the circle is ![x^2+(y+4)^2=64](https://tex.z-dn.net/?f=x%5E2%2B%28y%2B4%29%5E2%3D64)
We need to determine the center and radius of the circle.
<u>Center</u>:
The general form of the equation of the circle is ![(x-h)^2+(y-k)^2=r^2](https://tex.z-dn.net/?f=%28x-h%29%5E2%2B%28y-k%29%5E2%3Dr%5E2)
where (h,k) is the center of the circle and r is the radius.
Let us compare the general form of the equation of the circle with the given equation
to determine the center.
The given equation can be written as,
![(x-0)^2+(y+4)^2=64](https://tex.z-dn.net/?f=%28x-0%29%5E2%2B%28y%2B4%29%5E2%3D64)
Comparing the two equations, we get;
(h,k) = (0,-4)
Therefore, the center of the circle is (0,-4)
<u>Radius:</u>
Let us compare the general form of the equation of the circle with the given equation
to determine the radius.
Hence, the given equation can be written as,
![x^2+(y+4)^2=8^2](https://tex.z-dn.net/?f=x%5E2%2B%28y%2B4%29%5E2%3D8%5E2)
Comparing the two equation, we get;
![r^2=8^2](https://tex.z-dn.net/?f=r%5E2%3D8%5E2)
![r=8](https://tex.z-dn.net/?f=r%3D8)
Thus, the radius of the circle is 8
Step-by-step explanation:
your friend is closer to the school (b)
it's graph covers less area..
Answer:
The formula to calculate standard deviation from probability is \sqrt(n*p*(1-p)). n is the sample size, and 200 in this case (number of putts for practice). p is 80% or 0.8, the probability that he can make it. So the standard deviation is \sqrt(200*0.8*(1-0.8)=\sqrt(200*0.8*0.2)=\sqrt(16)=4.